Pier and abutment hanging bottom technology

Abstract

The invention discloses a pier base lifting technology. The pier base lifting technology comprises the following steps of using two adjacent bridge steel pipe piles as a pier base lifting unit, and laying steel plates on the top surface of each bridge steel pipe pile for aligning; enabling a pier hoisting bench formed by vertical beams penetrating through drilling holes in two ends of a first carrying pole beam, and cross beams penetrating through drilling holes in a second carrying pole beam and a third carrying pole beam to be arranged on each bridge steel pipe pile in a spanning manner; erecting a formwork on the hoisting benches, and performing casting operation; removing the pier hoisting benches; and completing the pier base lifting operation of the two adjacent bridge steel pipe piles. According to the pier base lifting technology disclosed by the invention, based on that the stability of the pier hoisting bench is improved, the pier base lifting operation of the two adjacent bridge steel pipe piles can be completed at the same time; the operation level is high; and in the operation process, the vertical beams at the two ends of each first carrying pole beam, the cross beams on the second carrying pole beams, the cross beams on the third carrying pole beams, and second round steel hanging rods can be recovered and reused, so that the construction cost is effectively saved.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a bottom-hanging process for piers and abutments. Background technique [0002] With the continuous development of the economy, the situation that some roads, railroads, highways, and rivers are not connected between cities has been greatly improved, and the construction progress of various bridges is also gradually accelerating. However, the existing bridges There are still many problems in the pier and abutment construction technology, especially in the construction of pier abutments in water, usually using cofferdam filling to land, pile foundation hoop support method and steel box cofferdam method, etc. Among them, cofferdam filling to land is used Double rows of Larsen steel sheet piles above 12m are used, and clay is filled between the double rows of sheet piles to form a cofferdam. After the cofferdam is formed, plain soil is used to backfill it to form land co...

AI Technical Summary

Problems solved by technology

During the construction process, earthwork backfilling and cleaning have a great impact on the river environment, and the cost of cofferdam measures is high; A construction method in which the resistance passes through the corbels on the steel plate hoop to support the abutment bracket. However, the prefabricated piles or columns of the drilled pile impact hoop method are regular, and the friction is not easy to control. In addition, it is difficult to install and remove the hoop underwater.

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